Air treatment system



FIG. 1 is a perspective view of the air treatment system of the new design;

FIG. 2 is a right side elevational view thereof, the left side elevational view being identical thereto;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The claimed portions of the air treatment system are shaded and in solid line. Features of the air treatment system shown in broken lines are for environmental purposes and do not form any part of the claimed design. Further, all broken lines bounding a shaded portion of the design form the boundary of the design, with the bounding broken lines forming no part of the claimed design. 

CLAIM The ornamental design for air treatment system, as shown and described. 